KR102533688B1 - Camera module and a method of actively aligning a lens barrel of the camera module - Google Patents

Abstract

Embodiments include a circuit board, a lens driving device including a bobbin disposed on the circuit board and having an inner circumferential surface of a screw thread, a first bonding unit disposed between the circuit board and the lens driving unit, and a second bonding unit, so that the bobbin is free. It includes a lens barrel coupled to an inner circumferential surface of the screw thread, the lens barrel is tilted by a predetermined angle with respect to a first axis, and the first axis is an optical axis of the lens barrel when the lens barrel is not tilted.

Description

A method for actively aligning a camera module and a lens barrel of the camera module

In the embodiment, Active Align is possible A camera module and a method of actively aligning a lens barrel of the camera module.

The contents described in this part simply provide background information on the embodiments and do not constitute prior art.

In recent years, the development of IT products such as mobile phones, smart phones, tablet PCs, and laptops with built-in micro digital cameras has been actively conducted.

In the case of a camera module mounted on a small electronic product such as a smartphone, each component constituting the camera module is separately manufactured and assembled to complete the camera module.

However, when assembling the camera module, a tilt phenomenon occurs when a bobbin included in a lens driving device performing an auto-focusing function of the camera module moves in an optical axis direction. In the tilt phenomenon, the bobbin does not move in the optical axis direction due to deflection of the electromagnetic force applied to the bobbin or structural factors of the lens driving device, but moves in an inclined direction in the second and/or third directions perpendicular to the optical axis direction. refers to the phenomenon

When assembling the camera module, active alignment for driving the lens driving device is required to check whether or not the tilt phenomenon of the bobbin has occurred.

Therefore, the embodiment is capable of active alignment The purpose is to provide a camera module.

The technical problem to be achieved by the embodiment is not limited to the technical problem mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

A camera module according to an embodiment includes a circuit board; a lens driving device disposed on the circuit board and including a bobbin having an inner circumferential surface of a screw thread; a first adhesive portion disposed between the circuit board and the lens driving device; and a lens barrel coupled to an inner circumferential surface of the unscrewed thread of the bobbin by a second adhesive portion, wherein the lens barrel is tilted by a predetermined angle with respect to a first axis, and the first axis is the lens barrel without tilting. is the optical axis of the lens barrel at

The second adhesive portion may be coupled to the inner circumferential surface of the bobbin and the outer circumferential surface of the lens barrel.

The bobbin may include a first protrusion protruding from the inner circumferential surface of the bobbin toward the outer circumferential surface of the lens barrel, and the second adhesive part may be coupled to the first protrusion and the outer circumferential surface of the lens barrel.

The second adhesive portion may be formed of an ultraviolet curable material. An image sensor disposed on the circuit board facing the lens barrel may be included. The camera module may include a sensor base disposed on the circuit board; and a filter disposed on the sensor base.

The lens driving device includes a housing accommodating the bobbin therein; and a coil and a magnet for moving the bobbin in an optical axis direction within the housing by electromagnetic interaction.

The coil may be disposed on the bobbin, and the magnet may be disposed on the housing. The first adhesive part may be attached to the circuit board and the lens driving device.

The camera module may include a sensor base disposed between the lens driving device and the circuit board, and the first adhesive part may be attached to the sensor base and the lens driving device.

An embodiment relates to a method for actively aligning a lens barrel of a camera module, comprising: seating a circuit board on a stage; bonding a lens driving device including a bobbin having an inner circumferential surface of a threadless thread to the circuit board using a first bonding part; and forming and curing a second adhesive portion on the inner circumferential surface of the bobbin and the outer circumferential surface of the lens barrel, wherein the lens barrel is tilted by a predetermined angle with respect to a first axis after the second adhesive portion is cured, The first axis may be an optical axis of the lens barrel when the lens barrel is not tilted.

In the step of forming and curing the second adhesive portion, the second adhesive portion may be formed on the inner circumferential surface of the bobbin and the outer circumferential surface of the lens barrel.

In the forming and curing of the second adhesive portion, the second adhesive portion may be applied to the first protrusion formed on the inner circumferential surface of the bobbin and the outer circumferential surface of the lens barrel.

In the step of forming and curing the second adhesive portion, the second adhesive portion may be formed of an ultraviolet curable material.

Attaching the lens driving device to the circuit board may include forming the first adhesive part on the circuit board; coupling the lens driving device to the first adhesive part; and curing the first adhesive portion.

Adhering the lens driving device to the circuit board may include adhering the sensor base to the circuit board using an adhesive; and competing the sensor base and the lens driving device by using the first adhesive part.

According to the above-described embodiment, the camera module can perform auto focusing and hand shake correction functions that do not deviate from the range of design values, despite the tilt phenomenon of the lens driving device and the bobbin occurring during the assembly process of the camera module.

In addition, according to the above-described embodiment, since the sensor holder may not be used, there is an effect of simplifying the process and reducing cost.

In addition, according to the above-described embodiment, since the lens barrel is not fastened to the lens driving device by screwing, it is possible to prevent the occurrence of tilt.

In addition, according to the above-described embodiment, since an ultraviolet curing method is used when coupling the lens barrel and the bobbin, a thermal curing process may not be performed, and tilt generation due to contraction of the adhesive portion due to thermal curing may be prevented.

1 is a perspective view schematically illustrating a lens driving device according to an exemplary embodiment.
2 is an exploded perspective view illustrating a lens driving device according to an exemplary embodiment.
3 is a perspective view illustrating a housing according to an exemplary embodiment.
4 is a rear perspective view showing a housing according to an exemplary embodiment.
5 is a plan view illustrating an upper elastic member according to an embodiment.
6 is a plan view showing a lower elastic member according to an embodiment.
7 is a perspective view showing a state in which a support member is disposed according to an exemplary embodiment.
8 is a front view showing a support member according to an exemplary embodiment.
9 is a front view showing a support member according to another embodiment.
10A is an exploded perspective view illustrating a camera module according to an exemplary embodiment.
10B is a front view illustrating an active alignment of the camera module of FIG. 10A.
11A is an exploded perspective view illustrating a camera module according to another embodiment.
11B is a front view illustrating an active alignment of the camera module of FIG. 11A.
12 is a schematic cross-sectional view showing a state in which a lens barrel is fixed or coupled to a bobbin by a second adhesive part according to an exemplary embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Embodiments can apply various changes and can have various forms, and specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the embodiments to a specific form disclosed, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the embodiments. In this process, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of description.

Terms such as "first" and "second" may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. In addition, terms specifically defined in consideration of the configuration and operation of the embodiment are only for describing the embodiment, and do not limit the scope of the embodiment.

In the description of the embodiment, in the case where it is described as being formed on "upper (above)" or "lower (on or under)" of each element, on or under (on or under) ) includes both elements formed by directly contacting each other or by indirectly placing one or more other elements between the two elements. In addition, when expressed as “up (up)” or “down (down) (on or under)”, it may include the meaning of not only the upward direction but also the downward direction based on one element.

In addition, relational terms such as "upper/upper/upper" and "lower/lower/lower" used below do not necessarily require or imply any physical or logical relationship or order between such entities or elements, It may be used only to distinguish one entity or element from another entity or element.

In addition, an orthogonal coordinate system (x, y, z) can be used in the drawing. In the drawing, the x-axis and the y-axis mean planes perpendicular to the optical axis, and for convenience, the optical axis direction (z-axis direction) can be referred to as a first direction, an x-axis direction as a second direction, and a y-axis direction as a third direction. .

1 is a perspective view schematically illustrating a lens driving device 1000 according to an exemplary embodiment. 2 is an exploded perspective view illustrating a lens driving device 1000 according to an exemplary embodiment. 3 is a perspective view showing a housing 140 according to an embodiment. 4 is a rear perspective view showing a housing 140 according to an exemplary embodiment. 5 is a plan view showing the upper elastic member 150 according to an embodiment. 6 is a plan view showing the lower elastic member 160 according to an embodiment.

An image stabilization device applied to a small camera module of a mobile device such as a smartphone or tablet PC is designed to prevent the outline of a captured image from being formed clearly due to vibration caused by the user's hand shake when capturing a still image. means a configured device. In addition, the auto focusing device is a device that automatically focuses an image of a subject on the image sensor (810, see FIG. 10A). Such an image stabilization device and an auto-focusing device can be configured in various ways. In the case of an embodiment, an optical module composed of a plurality of lenses is moved in a first direction or moved on a plane perpendicular to the first direction to prevent such hand shake. A correction operation and/or an auto focusing operation may be performed.

As shown in FIGS. 1 and 2 , the lens driving device 1000 according to the embodiment may include a movable part 100 . At this time, the movable unit 100 may perform functions of auto focusing and hand shake correction of the lens.

As shown in FIG. 2, the movable part 100 includes a bobbin 110, a coil 120, a first magnet 130, a housing 140, an upper elastic member 150, and a lower elastic member 160. can do.

The bobbin 110 has a coil 120 disposed inside the first magnet 130 on an outer circumferential surface, and the housing ( 140) may be installed to be reciprocally movable in the first direction in the inner space. A coil 120 may be installed on an outer circumferential surface of the bobbin 110 to enable electromagnetic interaction with the first magnet 130 .

In addition, the bobbin 110 is elastically supported by the upper and lower elastic members 150 and 160 and moves in a first direction to perform an auto focusing function.

The bobbin 110 may include a lens barrel 400 (see FIG. 10A) in which at least one lens is installed. The lens barrel 400 can be coupled to the inside of the bobbin 110 in various ways.

For example, a female screw thread is formed on the inner circumferential surface of the bobbin 110, and a male screw thread corresponding to the screw thread is formed on the outer circumferential surface of the lens barrel 400. can be coupled to However, this is not limited thereto, and the lens barrel 400 may be directly fixed to the inside of the bobbin 110 by a method other than screw coupling without forming a screw thread on the inner circumferential surface of the bobbin 110 . Alternatively, the one or more lenses may be integrally formed with the bobbin 110 without the lens barrel 400 .

The lens coupled to the lens barrel 400 may be composed of one sheet, or two or more lenses may form an optical system.

The auto focusing function is controlled according to the direction of the current, and the auto focusing function may be implemented by moving the bobbin 110 in the first direction. For example, when a forward current is applied, the bobbin 110 may move upward from an initial position, and when a reverse current is applied, the bobbin 110 may move downward from an initial position. Alternatively, the moving distance in one direction from the initial position may be increased or decreased by adjusting the amount of one-way current.

A plurality of upper support protrusions 113 (see FIG. 7 ) and lower support protrusions (not shown) may protrude from the upper and lower surfaces of the bobbin 110 . The upper support protrusion 113 may be provided in a cylindrical shape or a prismatic shape, and may couple and fix the inner frame 151 of the upper elastic member 150 and the bobbin 110 .

According to the embodiment, a first through hole 151a may be formed at a position corresponding to the upper support protrusion 113 of the inner frame 151 .

In this case, the upper support protrusion 113 and the first through hole 151a may be fixed by thermal fusion or by an adhesive material such as epoxy. In addition, a plurality of upper support protrusions 113 may be provided. At this time, the distance between each of the upper support protrusions 113 may be appropriately arranged within a range in which interference with neighboring parts can be avoided.

That is, each of the upper support protrusions 113 may be arranged at regular intervals symmetrically with respect to the center of the bobbin 110, and their intervals are not constant, but with respect to a specific imaginary line passing through the center of the bobbin 110 It may be formed to be symmetrical.

The lower support protrusion may be provided in a cylindrical shape or a prismatic shape like the upper support protrusion 113, and may couple and fix the inner frame 161 of the lower elastic member 160 and the bobbin 110.

According to the embodiment, a second through hole 161a may be formed at a position corresponding to the lower support protrusion of the inner frame 161 . In this case, the lower support protrusion and the second through hole 161a may be fixed by thermal fusion or by an adhesive material such as epoxy. In addition, a plurality of lower support protrusions may be provided as shown in FIG. 9 .

At this time, the distance between each of the lower support protrusions may be appropriately arranged within a range in which interference with neighboring parts can be avoided. That is, each lower support protrusion may be arranged at regular intervals symmetrically with respect to the center of the bobbin 110 .

The housing 140 has a hollow pillar shape supporting the first magnet 130 and may be formed in a substantially rectangular shape. can In this case, the housing 140 may include a first surface 141 and a second surface 142 . The first surface 141 may be a surface on which the first magnet 130 is installed, and the second surface 142 may be a surface on which the support member 220 is disposed.

The first surface 141 may be formed at a corner portion, and according to an embodiment, may be formed with an area corresponding to or larger than that of the first magnet 130 . At this time, the first magnet 130 may be fixed to the seating portion 141a of the first magnet 130 formed on the inner surface of the first surface 141 .

The seating portion 141a of the first magnet 130 may be formed as a groove corresponding to the size of the first magnet 130, and has at least three surfaces facing the first magnet 130, that is, both side surfaces and top surfaces. view can be placed.

Meanwhile, the first magnet 130 may be fixed to the seating portion 141a of the first magnet 130 with an adhesive, but is not limited thereto, and an adhesive member such as double-sided tape may be used. Alternatively, instead of forming the seating portion 141a of the first magnet 130 as a concave groove as shown in FIG. 4 , it is also possible to form a mounting hole into which a part of the first magnet 130 can be exposed or inserted.

A plurality of third stoppers 143 may protrude from the upper surface of the housing 140 . The third stopper 143 may limit the upward movement of the housing 140 .

In addition, the third stopper 143 may also serve to guide the installation position of the upper elastic member 150. To this end, as shown in FIG. 3, the third stopper 143 of the upper elastic member 150 A guide groove 155 having a corresponding shape may be formed at a position corresponding to the stopper 143 .

Meanwhile, the first surface 141 may be disposed parallel to the side surface of the cover member 300, but is not limited thereto, and the first surface 141 has a surface larger than the second surface 142. It can be formed to have

In addition, as shown in FIGS. 3 and 4 , the escape groove 142a having a certain depth may be concavely formed on the second surface 142 . In the embodiment, the lower surface of the escape groove 142a may form an open opening. However, it is not limited thereto, and an opening in which the upper surface of the escape groove 142a is open may be formed, or an opening in which both the upper and lower surfaces are open may be formed.

Since the escape groove 142a is provided, when the bobbin 110 moves in the first direction with respect to the housing 140, spatial interference between the connecting members 153 and 163 and the bobbin 110 is eliminated and the connecting member 153 ) 163 can be more easily elastically deformed. In addition, the lower part of the escape groove 142a can prevent the second coupling part 224 of the lower part of the support member 220 from interfering with the housing 140 . Also, as shown in FIG. 4 , the upper side of the escape groove 142a constitutes a stepped portion 142b to support a part of the upper side of the support member 220 .

In addition, the location of the escape groove 142a may be disposed on the side of the housing 140 as in the embodiment, but the connection members 153 and 163 of the elastic members 150 and 160 and the support member 220 Depending on the shape and/or position, it may be disposed at the corner of the housing 140.

In addition, a plurality of upper frame support protrusions 144 to which the outer frame 152 of the upper elastic member 150 is coupled may protrude from the upper side of the housing 140 . In this case, the number of upper frame support protrusions 144 may be greater than the number of upper support protrusions 113 described above. This is because the length of the outer frame 152 is longer than the length of the inner frame 151 .

Meanwhile, a third through hole 152a having a corresponding shape may be formed in the outer frame 152 corresponding to the upper frame support protrusion 144, and may be fixed there using an adhesive or thermal fusion.

In addition, as shown in FIG. 4 , a plurality of lower frame support protrusions 145 coupled to the outer frame 162 of the lower elastic member 160 may protrude from the lower side of the housing 140 . In this case, the number of lower frame support protrusions 145 may be greater than the number of the lower support protrusions described above. This is because the length of the outer frame 162 of the lower elastic member 160 is longer than the length of the inner frame 161 .

Meanwhile, a fourth through hole 162a having a corresponding shape may be formed in the outer frame 162 corresponding to the lower frame support protrusion 145, and may be fixed there using an adhesive or thermal fusion.

In addition, a fourth stopper 147 may protrude from the lower side of the housing 140 . The fourth stopper 147 may limit a downward movement distance of the housing 140 . In this case, the fourth stopper 147 prevents the bottom surface of the housing 140 from colliding with the base 210 and/or the printed circuit board 250 .

In addition, the fourth stopper 147 may maintain a predetermined distance from the base 210 and/or the printed circuit board 250 during an initial state and normal operation. Through this configuration, the housing 140 is spaced downward from the base 210 and upward from the cover member 300, so that the height in the first direction can be maintained by the support member 220 without vertical interference. . Accordingly, the housing 140 may perform shifting operations in second and third directions perpendicular to the first direction.

As shown in FIGS. 5 and 6 , the upper elastic member 150 and the lower elastic member 160 may elastically support the upward and/or downward motion of the bobbin 110 in the first direction. The upper elastic member 150 and the lower elastic member 160 may be provided as leaf springs.

The upper elastic member 150 is provided on the upper side of the bobbin 110, the inner frame is coupled to the bobbin 110, and the outer frame is coupled to the housing 140. The lower elastic member 160 is provided on the lower side of the bobbin 110, the inner frame is coupled to the bobbin 110, and the outer frame is coupled to the housing 140.

The upper elastic member 150 and the lower elastic member 160 include the inner frames 151 and 161 coupled to the bobbin 110 and the outer frames 152 and 162 coupled to the housing 140 and the inner frame 151 ) 161 and the outer frames 152 and 162 may include connecting members 153 and 163.

The connecting members 153 and 163 may be bent at least once to form a pattern having a predetermined shape. The bobbin 110 may be elastically (or elastically) supported during the upward and/or downward motion in the first direction through the change in position and fine deformation of the connecting members 153 and 163.

According to the embodiment, as shown in FIG. 5, the upper elastic member 150 has a plurality of first through-holes 152a in the outer frame 152 and a plurality of second through-holes in the inner frame 151 ( 151a) may be provided.

The first through hole 152a is coupled to the upper frame support protrusion 144 provided on the upper surface of the housing 140, and the second through hole 151a or groove is provided on the upper surface of the bobbin 110 It can be combined with the upper support protrusion 113. That is, the outer frame 152 is fixed and coupled to the housing 140 through the first through hole 152a, and the inner frame 151 is fixed to the bobbin 110 through the second through hole 151a or groove. and may be combined.

The connection member 153 may connect the inner frame 151 and the outer frame 152 so that the inner frame 151 is elastically deformable in a first direction within a predetermined range with respect to the outer frame 152. there is.

At least one of the inner frame 151 and the outer frame 152 of the upper elastic member 150 is electrically connected to at least one of the coil 120 of the bobbin 110 and the printed circuit board 250. At least one terminal unit 251 may be provided.

As shown in FIG. 6, the lower elastic member 160 has a plurality of insertion grooves 162a or holes in the outer frame 162, and a plurality of third through holes 161a or grooves can be provided.

The insertion groove 162a or hole is coupled to the lower frame support protrusion 147 provided on the lower surface of the housing 140, and the third through hole 161a or groove is provided on the lower surface of the bobbin 110. It can be combined with the lower support protrusion. That is, the outer frame 162 is fixed and coupled to the housing 140 through the insertion groove 162a or hole, and the inner frame 161 is attached to the bobbin 110 through the third through hole 161a or groove. Can be fixed and combined.

The connecting member 163 may connect the inner frame 161 and the outer frame 162 such that the inner frame 161 is elastically deformable in a first direction in a predetermined range with respect to the outer frame 162. there is.

As shown in FIG. 5 , the upper elastic member 150 may include a first upper elastic member 150a and a second upper elastic member 150b separated from each other. Through this two-part structure, the upper elastic member 150 can receive currents of different polarities or different power sources from each other to the first upper elastic member 150a and the second upper elastic member 150b.

That is, after the inner frame 151 and the outer frame 152 are coupled to the bobbin 110 and the housing 140, respectively, the inner frame corresponding to both end lines of the coil 120 disposed on the bobbin 110. By providing a solder part at the position 151, a current having a different polarity or a different power source can be applied by performing a conductive connection such as soldering in the solder part. In addition, the first upper elastic member 150a is electrically connected to one of the ends of the coil 120, and the other of the ends of the coil 120 and the second upper elastic member 150b are electrically connected. connected, and may receive current and/or voltage from the outside.

Meanwhile, the upper elastic member 150 and the lower elastic member 160, the bobbin 110, and the housing 140 may be assembled through thermal fusion and/or bonding using an adhesive. At this time, the fixing operation may be completed by bonding using an adhesive after fixing by thermal fusion according to the assembly sequence.

As a modified embodiment, the lower elastic member 160 may have a two-part structure and the upper elastic member 150 may have an integral structure.

At least one of the inner frame 161 and the outer frame 162 of the lower elastic member 160 may be electrically connected to at least one of the coil 120 of the bobbin 110 and the printed circuit board 250. . In addition, the printed circuit board 250 may include at least one first terminal unit 251 electrically connected to the elastic member.

The printed circuit board 250 is coupled to the upper surface of the base 210, and as shown in FIG. 2, a through hole may be formed at a corresponding position to expose the seating groove 214 of the support member 220. there is.

A surface on which the bent first terminal unit 251 is installed may be formed on the printed circuit board 250 . In the embodiment, the printed circuit board 250 may form a surface on which one bent first terminal unit 251 is installed. A plurality of terminals 251b are disposed on the surface on which the first terminal unit 251 is installed, and external power may be applied to supply current to the coil 120 . The number of terminals 251b formed in the first terminal unit 251 may be increased or decreased according to the types of components that need to be controlled. In addition, the printed circuit board 250 may have one more bent surface and may further include a terminal part.

The base 210 is disposed below the bobbin 110 and, as shown in FIG. 2 , may be provided in a substantially rectangular shape, and the support member 220 may be fixed to a straight surface. A step 211 may be formed on the base 210 so that an adhesive may be applied when the cover member 300 is adhesively fixed. At this time, the bottom surface of the step may be in contact with the end of the cover member 300 .

A support groove having a corresponding size may be formed on a surface of the base 210 facing the portion of the printed circuit board 250 where the first terminal portion 251 is formed. The support groove is formed concave inward from the outer circumferential surface of the base 210 to a certain depth, so that the portion where the first terminal portion 251 is formed does not protrude outward or the amount of protrusion can be adjusted.

On the other hand, the step 211 can guide the cover member 300 coupled to the upper side, and also, the end of the cover member 300 can be coupled to surface contact. At this time, the step 211 and the end of the cover member 300 may be adhesively fixed and sealed with an adhesive or the like.

A support member 220 seating groove 214 into which the support member 220 can be inserted may be formed concavely on an upper surface of the base 210 . An adhesive is applied to the seating groove 214 of the support member 220 to fix the support member 220 so as not to move.

An end of the support member 220 may be inserted or placed into the seating groove 214 of the support member 220 and fixed through an adhesive or the like. A plurality of or at least one seating groove 214 may be formed on a straight surface on which the support member 220 is installed, and the seating groove 214 may have a substantially rectangular shape.

In addition, as shown in FIG. 2, in the embodiment, two seating grooves 214 may be provided for each straight surface, which may be increased or decreased according to the shape of the support member 220, or one may be formed. More than one may be formed.

The cover member 300 may be provided in a substantially box shape and may cover the movable part 100 , the printed circuit board 250 , and the base 210 . At this time, as shown in FIG. 1, etc., the cover member 300 has a relief skin or groove portion formed at a position corresponding to the step 211 of the base 210, and an adhesive or the like can be injected through the relief skin or groove portion. there is.

At this time, the injected adhesive is set to have a low viscosity, so that the adhesive injected through the relief or groove can permeate the contact position between the step 211 and the end of the cover member 300. In this way, the adhesive member applied to the relief or groove fills the gap between the facing surfaces of the cover member 300 and the base 210 through the relief or groove, so that the cover member 300 is attached to the base. It can be configured to seal while being combined with (210).

Meanwhile, a camera module may be configured by disposing the image sensor 810 and the printed circuit board 250 under the base 210 and assembling the lens barrel 400 to the bobbin 110 . Alternatively, a separately configured sensor holder (900, see FIG. 11A) may be further included under the base 210. Alternatively, the second circuit board 820 (see FIG. 10A) on which the image sensor 810 is mounted may be directly coupled to the bottom surface by extending the base 210 downward. It can be applied to mobile devices, etc.

7 is a perspective view showing a state in which a support member 220 is disposed according to an embodiment. 8 is a front view showing a support member 220 according to an embodiment. 9 is a front view showing a support member 220 according to another embodiment.

The support member 220 is disposed on the side of the housing 140, has an upper side coupled to the housing 140 and a lower side coupled to the base 210, and the bobbin 110 and the housing 140 are It may be supported so as to be movable in a second direction and a third direction perpendicular to the first direction, and may also be electrically connected to the coil 120 .

As shown in FIG. 7 , the support members 220 are individually disposed on the second surface 142 of the housing 140 to support the housing 140 at a predetermined distance from the base 210 . One end of the support member 220 may be inserted or placed into the seating groove 214 of the support member 220 and fixed with an adhesive such as epoxy, and the other end may be fixed to the upper end of the side wall of the housing 140. .

Since the support member 220 according to the embodiment is disposed on the second surface 142 of the housing 140, a total of four may be installed symmetrically. However, it is not limited thereto, and it is also possible to consist of eight, two for each straight plane. Also, the support member 220 may be electrically connected to the upper elastic member 150 or electrically connected to a straight surface of the upper elastic member 150 .

Specifically, the support member 220 may include a first coupling portion 221, a second coupling portion 224, a first elastic deformation portion 222, a second elastic deformation portion 223, and a connection portion 225. can

The first coupling part 221 is connected to the upper end of the second surface 142 of the housing 140, and is formed by forming a concave groove at a position corresponding to the coupling protrusion protruding from the second surface 142 to fit them together. can be fixed

In addition, since the support member 220 is formed as a separate member from the upper elastic member 150, the first coupling part 221 is electrically connected to the support member 220 and the upper elastic member 150 through conductive adhesive, soldering, etc. can be connected to Accordingly, the upper elastic member 150 may apply current to the coil 120 through the electrically connected support member 220 .

The second coupling portion 224 is a portion coupled to the base 210, may be provided at an end of the support member 220, and is a plate wider than the first and second elastically deformable portions 222 and 223. It may be provided in a shape, but is not limited thereto, and may have a narrow or corresponding width.

According to the embodiment, the second coupling portion 224 is separated into two as shown in FIGS. 8 and 9, and each can be inserted or disposed in the seating groove 214 of the support member 220 of the base 210. . The second coupling part 224 may be fixedly coupled to the seating groove 214 of the support member 220 by an adhesive member such as epoxy.

However, it is not limited thereto, and the seating groove 214 of the support member 220 may correspond to the second coupling part 224 so as to fit and combine them. Alternatively, one second coupling part 224 may be formed, or two or more may be formed. Correspondingly, the base 210 may have a seating groove 214 for the support member 220 formed therein.

The elastic deformable parts 222 and 223 are provided in a shape bent at least once or more to form a pattern of a certain shape. According to the embodiment, the elastic deformation part may include first and/or second elastic deformation parts 222 and 223, and the first elastic deformation part 222 is It extends from the first coupling part 221 and is connected to the connection part 225 . The second elastically deformable part 223 extends from the first coupling part 221 and is connected to the connection part 225 .

In addition, it may be formed with the connecting portion 225 interposed in the middle, and may also be provided in a shape corresponding to each other. For example, as shown in FIGS. 8A and 8B, when the first elastically deformable portion 222 is provided in a zigzag shape through two or more bends, the second elastically deformable portion 223 may also be formed to correspond thereto, but this It is not limited, and only the first elastic deformation part 222 or the second elastic deformation part 223 may be provided in a different shape.

The above is only one embodiment, and it is also possible to configure it to have various patterns such as a zigzag shape. At this time, the first and second elastic deformation parts 222 and 223 may be configured as one without distinguishing them, or configured only in the form of a suspension wire without such a pattern.

According to the embodiment, straight portions of the first and second elastically deformable parts 222 and 223 may be formed substantially parallel to a plane perpendicular to the first direction.

When the housing 140 moves in the second and/or third directions perpendicular to the first direction, the elastic deformation parts 222 and 223 are formed in the direction in which the housing 140 moves or in the longitudinal direction of the support member 220. It can be slightly elastically deformed.

Then, the housing 140 can substantially move in the second and third directions with little positional change in the first direction, thereby increasing the accuracy of hand shake correction. This utilizes the characteristic that the elastic deformation parts 222 and 223 can be stretched in the longitudinal direction. Here, the longitudinal direction may be a direction connecting the first and second coupling parts 221 and 224 .

The connection part 225 may connect the first elastic deformation part 222 and the second elastic deformation part 223 to each other and may be provided as a pair disposed symmetrically with each other. As described above, the connecting portion 225 may be disposed in the middle of the elastic deformable portions 222 and 223, but is not limited thereto, and may be disposed in connection with one elastic deformable portion.

In the case of the embodiment, the first and second elastic deformable parts 222 and 223 are provided one by one, but the first and second coupling parts 221 and 224 are formed as one body, and the pair of first And the second elastic deformation parts 222 and 223 may be fixed to the housing 140 and the base 210 at once.

10A is an exploded perspective view illustrating a camera module according to an exemplary embodiment. 10B is a front view illustrating an active alignment of the camera module of FIG. 10A.

In the embodiment shown in FIG. 10A , the camera module may include a lens barrel 400, a lens driving device 1000, an image sensor 810, a second circuit board 820, and a filter 910.

In the embodiment, the lens barrel 400 may be formed in a threadless type. That is, a screw thread for coupling with the bobbin 110 may not be formed on the outer circumferential surface of the lens barrel 400, and therefore, a screw thread for coupling with the thread of the lens barrel 400 may not be formed on the inner circumferential surface of the bobbin 110. can

In the embodiment, the lens barrel 400 may be coupled to the bobbin 110 by an adhesive. To this end, a second bonding portion P2 (see FIG. 12) is formed between the lens barrel 400 and the bobbin 110. The second adhesive portion P2 will be described in detail below. The lens barrel 400 is fixed or coupled by the bobbin 110 and the second adhesive part P2 so that the bobbin 110 can move in the first direction together with the bobbin 110 moving in the first direction inside the lens driving device 1000. there is.

The image sensor 810 is mounted on the second circuit board 820 and senses an image of a subject incident through a lens provided in the lens barrel 400 . At this time, as described above, in order to sense a clear image of the subject, the lens driving device 1000 may perform auto focusing and hand shake correction functions.

The second circuit board 820 is electrically connected to the image sensor 810 and can receive image information of a subject acquired from the image sensor 810 and transmit it to a device or device outside the camera module.

The filter 910 may be mounted below the lens driving device 1000, and the filter 910 and the image sensor 810 mounted on the second circuit board 820 are separated from each other by a predetermined distance so as to face each other. may be provided. Due to this structure, the image sensor 810 can sense an image of a subject, light, etc. incident from the lens and filtered by the filter 910 . In this case, the filter 910 may be an infrared cut filter in one embodiment.

Also, in the embodiment, the camera module may include a first adhesive portion P1 and a second adhesive portion P2.

The first adhesive portion P1 may serve to fix or couple the lens driving device 1000 and the second circuit board 820 . To this end, the first adhesive portion P1 may be applied to the upper surface of the second circuit board 820, and eventually, the first adhesive portion P1 may be applied to the lower surface of the lens driving device 1000 and the second circuit board ( 820), the lens driving device 1000 and the second circuit board 820 may be fixed or coupled.

At this time, it is appropriate for the first adhesive portion P1 to use a material that can firmly fix or couple the second circuit board 820 and the lens driving device 1000 and is easy to apply and harden. The first adhesive portion P1 may be formed of a material that satisfies these conditions, for example, a thermosetting or photocurable (UV, etc.) adhesive.

Meanwhile, in the process of hardening, local shrinkage may occur in the first adhesive portion P1, but correction of such a tilt phenomenon is possible by the second adhesive portion P2. In addition, there may be no tilt phenomenon due to hardening of the first adhesive portion, and in this case, precise alignment may be possible by the second adhesive portion P2.

The second adhesive portion P2 may serve to fix or couple the lens driving device 1000 and the lens barrel 400 . To this end, the second adhesive portion P2 may be interposed between the inner side surface of the bobbin 110 and the outer side surface of the lens barrel 400 to fix or couple the lens driving device 1000 and the lens barrel 400. there is.

At this time, it is appropriate for the second adhesive portion P2 to be formed of an adhesive material that is easy to apply and harden and whose volume change due to hardening is limited. In order to form the second adhesive portion P2 having little change in volume due to curing of such a material, for example, it is appropriate to use an adhesive made of an ultraviolet curable material.

The reason why the second adhesive part P2 of this structure can correct the tilt phenomenon of the lens driving device 1000 and the lens barrel 400 is related to the active alignment process of the camera module. In the active alignment process, when assembling the camera module, the center of the lens provided in the lens barrel 400 and the center of the image sensor 810 are aligned with each other so that they exist on the same optical axis, and there is no abnormality in the auto focusing function of the camera module. This is a process of aligning the moving direction of the lens barrel 400 with the optical axis so that the lens barrel 400 moves in the first direction without tilting.

For active alignment, the mounting position of the lens barrel 400 is determined before inserting and mounting the lens barrel 400 into the lens driving device 1000 using an alignment device (not shown).

To this end, the aligning equipment rotates the lens barrel 400 around the optical axis at the top of the lens driving device 1000, rotates the lens barrel 400 by a predetermined angle in the second and/or third directions, and rotates the lens barrel 400 in the second and/or third directions. Performs a predetermined distance parallel movement, that is, shifting. Through such processes as rotation and shifting, the exact position of the lens barrel 400 to be inserted into the lens driving device 1000 is determined on the lens driving device 1000 .

The overall assembly process of the camera module of the embodiment is as follows.

First, the second circuit board 820 is seated on the stage 10 for assembling the camera module.

Next, a first adhesive portion P1 is applied and formed on the second circuit board 820 . At this time, as an example, the first adhesive portion P1 may be formed of an adhesive of a thermosetting or photocurable (UV, etc.) material as described above.

Next, the lens driving device 1000 is bonded to the first adhesive portion P1, and the first adhesive portion P1 is cured by heating or irradiating light. When the first adhesive portion P1 is cured, the second circuit board 820 and the lens driving device 1000 are firmly fixed or coupled.

Next, active alignment of the lens barrel 400 is performed on the top of the lens driving device 1000 using an aligning device. As described above in the active alignment process, the lens barrel 400 is rotated around the optical axis, rotated by a predetermined angle in the second and/or third directions, and shifted a predetermined distance in the second and/or third directions. etc.

Through active alignment, the lens barrel 400 aligns its longitudinal direction to the same position as the first direction, and aligns to the exact position set in the second and/or third directions.

Next, the lens barrel 400 is mounted at the bonding position of the bobbin 110, and a second adhesive portion P2 is formed on the inner surface of the bobbin 110 and/or the outer surface of the lens barrel 400. At this time, as an example, it is appropriate for the second adhesive portion P2 to be formed of an adhesive material that is easy to apply and harden, and whose volume change due to hardening is limited. It is appropriate to form the second adhesive portion P2 using, for example, an ultraviolet curable adhesive.

Next, the second adhesive portion P2 is hardened. In the case of the UV-curable adhesive of the embodiment, the second adhesive portion P2 may be cured by irradiation with UV rays. The second adhesive portion P2 hardly changes in volume due to curing.

Therefore, even if a tilt phenomenon occurs in the lens driving device 1000 and the bobbin 110 mounted thereto by curing of the first adhesive portion P1, the first, second, and third directions are based on the active alignment process. As a result, the lens barrel 400, which is positioned accurately by design, can maintain the correct position by design even after being coupled to the bobbin 110. That is, since the volume of the second adhesive hardly changes due to curing of the second adhesive, the lens barrel 400 may not or may not tilt, even if it does, within the range of the design reference value.

Therefore, the lens barrel 400 is independent of whether the length direction of the bobbin 110 is deflected in the second direction and/or the third direction perpendicular to the first direction and is located inside the housing 140. Even if tilted in the first direction or at a predetermined angle with the first direction, it may move within the range of the design reference value.

In addition, even if the tilted bobbin 110 mounted on the tilted lens driving device 1000 tilts and moves from the first axis direction by a predetermined angle, the actual tilt range of the lens driving device 1000 is not large, and the bobbin 110 ) is not actually long, even if the lens barrel 400 moves while being mounted on the tilted lens driving device 1000 and the bobbin 110, it does not tilt significantly from the first direction. Therefore, the camera module having this structure can perform auto focusing and hand shake correction functions that do not deviate from the design value range despite the occurrence of the above-mentioned tilt phenomenon.

Accordingly, the lens barrel 400 moves in the first direction irrespective of whether the bobbin 110 is deflected from the first direction to the second direction and/or the third direction perpendicular to the first direction. , or may move within the range of the design reference value even if it moves in a direction tilted at a predetermined angle with the first direction.

11A is an exploded perspective view illustrating a camera module according to another embodiment. 11B is a front view illustrating an active alignment of the camera module of FIG. 11A.

The embodiment shown in FIGS. 11A and 11B may further include a sensor holder 900 compared to FIGS. 10A and 10B. The sensor holder 900 is provided below the lens driving device 1000, and a filter 910 may be mounted thereon. At this time, the image sensor 810 is mounted on the second circuit board 820, and the filter 910 and the image sensor 810 may be spaced apart from each other by a predetermined distance and face each other.

Due to this structure, the image sensor 810 can sense an image of a subject, light, etc. incident from the lens and filtered by the filter 910 . In this case, the filter 910 may be an infrared cut filter in one embodiment.

The sensor holder 900 can be coupled to the second circuit board 820 by the fastening part 840 formed on the second circuit board 820, and the fastening part 840 has an adhesive such as epoxy for a firm connection. may be applied to fix or couple the sensor holder 900 and the second circuit board 820 to each other.

At this time, the first adhesive portion P1 may fix or couple the lens driving device 1000 and the sensor holder 900 . To this end, the first adhesive portion P1 may be interposed between the lower surface of the lens driving device 1000 and the upper surface of the sensor holder 900 . Meanwhile, the first adhesive portion P1 may be formed of a thermosetting or photocurable (UV, etc.) material, similar to the embodiment shown in FIGS. 10A and 10B.

Meanwhile, in the embodiment, since the position and material of the second adhesive part P2 are the same as those of the embodiment shown in FIGS. 10A and 10B, a detailed description thereof will be omitted. In addition, compared to the embodiment shown in FIGS. 10A and 10B, the sensor holder 900 is added, the filter 910 is provided in the sensor holder 900, and the first adhesive part P1 is a lens. It is the same except that it is interposed between the drive device 1000 and the sensor holder 900 and that the coupling part for coupling the second circuit board 820 and the sensor holder 900 is provided on the second circuit board 820. , description of the specific structure of the embodiment is omitted.

In addition, in the embodiment, compared to the embodiment shown in FIGS. 10A and 10B , in the camera module assembly process, after the second circuit board 820 is seated on the stage 10, the sensor holder 900 is placed on the second circuit board 820. ), and the first adhesive portion P1 is formed by being applied to the upper portion of the sensor holder 900, so a detailed description of the assembling process will be omitted.

10A and 10B, despite the tilt phenomenon of the lens driving device 1000 and the bobbin 110 caused by curing of the first adhesive portion P1, the camera module is within the range of the design value. It can perform auto focusing and image stabilization functions that do not deviate from the camera.

12 is a schematic cross-sectional view showing a state in which the lens barrel 400 is fixed or coupled to the bobbin 110 by the second adhesive part P2 according to an embodiment.

However, the lens barrel 400 fixed or combined with the bobbin 110 by the second adhesive part P2 is placed at the correct position by design when viewed in the first, second, and third directions by an active alignment process. has been

Meanwhile, in the embodiment, the second adhesive portion P2 is formed above the bobbin 110 and/or the lens barrel 400 to fix or couple the bobbin 110 and the lens barrel 400 to each other. The location and shape of (P2) are not limited to this. Therefore, the position and shape of the second adhesive portion P2 may be variously formed in consideration of the ease of application of the adhesive, the robustness of bonding, and the ease of use of UV equipment when formed using an ultraviolet curable adhesive as in the embodiment. .

In addition, in the second adhesive portion P2, when the adhesive is applied, the adhesive flows down the lands barrel 400 and the bobbin 110 and is transferred to the image area including the image sensor 810 and the filter 910, resulting in poor image quality. etc. can cause problems.

Therefore, in order to improve the cause of the image defect described above, the lower portion of the second adhesive portion P2 may form a structure necessary to prevent the adhesive from flowing down to the image area. For example, protrusions or concave parts are formed on the outer circumferential surface of the lens barrel 400 and the inner circumferential surface of the bobbin 110 coupled to the second adhesive part P2, respectively, or these protrusions or concave parts are labyrinth , or forming a very small distance between the outer circumference of the lens barrel 400 and the inner circumference of the bobbin 110 at the bottom of the second bonding portion P2. In addition, a structure that prevents the adhesive from flowing down to the image area from the lower portion of the second adhesive portion P2 may be formed by combining the above methods.

Although only a few have been described as described above in relation to the embodiments, various other forms of implementation are possible. The technical contents of the above-described embodiments may be combined in various forms unless they are incompatible with each other, and through this, may be implemented in a new embodiment.

10: Stage
1000: lens driving device
110: bobbin
120: coil
140: housing
150: upper elastic member
160: lower elastic member
210: base
220: support member
400: lens barrel
810: image sensor
820: second circuit board
840: fastening part
900: sensor holder
910: filter
P1: first adhesive part
P2: second adhesive part

Claims (16)

circuit board;
a lens driving device disposed on the circuit board and including a bobbin having an inner circumferential surface of a screw thread;
a first adhesive portion disposed between the circuit board and the lens driving device; and
A lens barrel coupled to an inner circumferential surface of the unthreaded thread of the bobbin by a second adhesive portion;
The lens barrel is tilted by a predetermined angle with respect to a first axis, and the first axis is an optical axis of the lens barrel when the lens barrel is not tilted. According to claim 1,
The second adhesive portion is coupled to the inner circumferential surface of the bobbin and the outer circumferential surface of the lens barrel. According to claim 2,
the bobbin includes a first protrusion protruding from the inner circumferential surface of the bobbin toward the outer circumferential surface of the lens barrel;
The second adhesive portion is coupled to the first protrusion and the outer circumferential surface of the lens barrel. According to claim 1,
The camera module wherein the second adhesive portion is formed of an ultraviolet curable material. According to claim 1,
A camera module including an image sensor disposed on the circuit board facing the lens barrel. According to claim 5,
a sensor base disposed on the circuit board; and
A camera module including a filter disposed on the sensor base. According to claim 1,
The lens driving device,
a housing accommodating the bobbin therein; and
A camera module comprising a coil and a magnet for moving the bobbin in an optical axis direction within the housing by electromagnetic interaction. According to claim 7,
The coil is disposed on the bobbin, and the magnet is disposed on the housing. According to claim 1,
The first adhesive portion is attached to the circuit board and the lens driving device. According to claim 1,
A sensor base disposed between the lens driving device and the circuit board;
The first adhesive portion is bonded to the sensor base and the lens driving device. A method for actively aligning a lens barrel of a camera module,
placing the circuit board;
bonding a lens driving device including a bobbin having an inner circumferential surface of a screw thread to the circuit board by using a first bonding part; and
bonding the inner circumferential surface of the bobbin and the outer circumferential surface of the lens barrel by using a second bonding part;
After the second adhesive portion is cured, the lens barrel is tilted by a predetermined angle with respect to a first axis, and the first axis is an optical axis of the lens barrel when the lens barrel is not tilted, and the lens barrel of the camera module is activated. How to align. According to claim 11,
In the step of forming and curing the second adhesive part,
The second adhesive part is formed on the inner circumferential surface of the bobbin and the outer circumferential surface of the lens barrel. According to claim 11,
In the step of forming and curing the second adhesive part,
The second adhesive part is applied to the outer circumferential surface of the lens barrel and the first protrusion formed on the inner circumferential surface of the bobbin to actively align the lens barrel of the camera module. According to claim 11,
In the step of forming and curing the second adhesive part,
The method of actively aligning the lens barrel of the camera module in which the second adhesive portion is formed of an ultraviolet curable material. According to claim 11,
The step of bonding the lens driving device to the circuit board,
forming the first adhesive part on the circuit board;
coupling the lens driving device to the first adhesive part; and
A method of actively aligning a lens barrel of a camera module comprising curing the first adhesive portion. According to claim 11,
The step of bonding the lens driving device to the circuit board,
bonding the sensor base to the circuit board using an adhesive; and
Competing the sensor base and the lens driving device by using the first adhesive portion.

Images